Does the PathFindIR II work
in fog?

Fog, rain, and high humidity can severely limit the range of a
thermal imaging system due to scattering of light off droplets of
water. The higher the density of droplets, the more the infrared signal
is diminished. Depending upon the ambient temperature, humidity, and
the scene content, the PathFindIR II and other thermal imaging systems
may or may not perform well. Please see the application
note regarding fog for more information.